COVID-19(3) Tight junctions.(1) severe acute respiratory syndrome coronavirus 2(1) alveolar epithelial cell(1) MMP(1) Cytokines(1) Extracellular matrix(1) adherens junction(1) cell junctions(1) ACE/Ang II/AT1R pathway(1) Coronavirus disease 2019(1) alveolar-capillary barrier(1) cytoskeleton(1) Pathogenesis(1) tight junction.(1) SARS-CoV-2(1) claudins(1) Endothelial cell(1) Blood-gas barrier(1) miRNA.(1)